Sierra

First, did you use OSCAR to track your results on your A10 machine. If you did then you can just add the A11 data to your old A10 results. That would be the best way to see what has happened. If you did not use OSCAR and still have the SD card from that machine you can load the A10 data in first and then update it with the A11.

With respect to your A11 was it set up exactly the same as the A10? If not what was changed. I cannot think of any reason if the setup was the same that the results would significantly change. A while back my wife switched from the S9 to the A10. I used exactly the same settings and 0.57 down to 0.53, and insignificant difference. Since that time I increased her EPR from 2 cm to 3 cm, and AHI has dropped to 0.49.

I have not seen any clear evidence that EPR increases CA events in my experience. What I have seen is that it can make a big reduction in hypopnea events. I went for a long time with EPR set for ramp only and was off during the rest of the sleep. My AHI was about 2.1 and CA events was the large portion of the total events. Then I switched to full time EPR and my AHI immediately dropped to about 0.8. The reduction was almost entirely hypopnea. And CA events did not change.

My experience is that CA events can be caused by higher pressure, and my strategy to deal with them is to keep pressure as low as possible and I have switched to a fixed CPAP pressure. Since EPR reduces pressure it really should not cause more CA. But EPR can affect everyone differently.

If the increase in your AHI is largely due to hypopnea events I do not think they are as serious as OA and CA events because it is a flow reduction not a full stoppage. However, I think I would go with the total AHI number and use the settings that give the lowest AHI.

In any case I would encourage you to use OSCAR if you are not. It would clearly show what happened. It is a free download but requires a SD card reader and PC or Mac.

OSCAR CPAP Monitoring Software

You may want to drag the Pressure chart down below the Large Leak chart so it shows, and the Pressure chart is hidden. It will become pretty boring with a fixed set pressure. I should move mine down too...

Hi again, I think the breaks are being caused by the mask slipping out of position long enough for the SmartStart feature to shut the machine down. Then when the mask is back in position it restarts the ramp which in most cases is very short as you are likely asleep or asleep in a minute or so. I don't see it causing any subsequent apnea events though.

About the only thing I see unusual about the Daily graph you provided is that between 1:00 and 1:30 you got some OA events in quick succession. That usually suggests body position or a kinked neck. Perhaps the collar was not as tight as usual or you were sleeping on your back for a while.

Unfortunately like me you are stuck with this complex (mixed) apnea situation. It tends to be erratic with most of the variation in the number of CA events. I seem to have transitioned from having event frequency less than 1 to more like 1.3. I hope the lower levels return, but it is only a hope, as I don't see anything that would help. My current chart below. The magenta bars are the CA events which are most erratic and basically responsible for the day to day variation. I think I get the lowest scores when I sleep between 6.5 to 7 hours, and the worst when I sleep over 8 hours. Sometimes nearer morning when I am not sleeping soundly I thing I get some false CA event indications when I am transitioning between being awake and being asleep. Some call that "Sleep-Wake" junk.

In any case I typically get most of my CA events in the second half of my sleep, possibly during REM sleep...

I don't think it is worth it. Need special masks, has no SD card to capture data, and some get irritation from the humidifier gizmo. My wife and I both have ResMed A10's and travel with them. No cost to bring them on board with you. The travel case is very good. It has a Velcro strap that attaches to the carry on extension handle. The two bar kind is the best so the CPAP bag does not spin on the handle.

We have a Z1 Auto machine that our son did not like and gave it to us. We never use it, and just keep it as an emergency spare.

Yes, for sure. See the link below for some tips. This site was started by a pharmacist who was concerned about the overuse of sleeping pills by seniors and the impact it was having on falls resulting in hip fracture. This link is the Hygiene of Sleep page, but there is much more at the site including the 10 tips for a better sleep document.

https://mysleepwell.ca/cbti/hygiene-of-sleep/

That sounds like a good plan!

I really doubt hackers would get in, or have any motive to mess with the machine if they could. Seems like a defective machine to me. It may actually be just the power supply and not the whole machine. We had a problem with my Wife's S9 ResMed when we were in the trailer and using the DC to DC power supply. The power supply was tripping out on what I believe was a false overload.

I think at this point I would just leave things as they are to collect more data. The Statistics tab will display a summary of the results since the last change to the settings. When it has been two weeks since that last change we can have a look to see how it turns out. I think you may be at the "Yes" answer to the old question "Are we there yet?".

Agree. Things look pretty good.

Sorry to hear about the TIA. My mother had those issues from time to time. Despite them she made it to 96 without a real stroke. That said, I think it would be prudent to talk to your doctor about it.

The overall AHI is not as low as I would expect but I don't see an obvious way to make a change. I find I go in cycles with CA events. I can be in the low 0.5 or less range and then shoot up to 2.0 or more. I would stick with this pressure for a while.